Eugene roman



2 Sheets-Sheet 1.

(No Model.)

B. HO MAN. BEVEL GRINDING MAGHINE FOR PLATE GLASS MANUFACTURE. No.451,303.

Patented Apr. 28, 1891.

I I WITNESSES W -al$ ATTORNEYS 2 Sheets-Sheet 2.

(No Model.)

. E. HUMAN.

BEVEL GRINDING MACHINE FOR PLATE GLASS MANUFACTURE. No. 451 303.

Patented Apr. 28,1891.'

WITNESSES Nurse STATES PATENT EUGENE HOMAN, OF NElV YORK, N. Y.

SPECIFICATION forming part of Letters Patent N0. 451,303, dated April28, 1891.

Application filed November '7, 1890. Serial No. 370,609. (No model.)

To all whom it may concern Be it known thatLEUGENE HOMAN,of New York, inthe county and State of New York, have invented a new and usefulBevel-Grinding Machine for Plate-Glass Manufacture, of which thefollowing is a full, clear, and exact description.

This invention relates to improvements in grinding-machines used to cutand polish bevel edges on rectangular plates of glass used for mirrorsand other purposes, and has for its objects to provide a simplepractical device which will afford means to produce bevel edges of anydesired angle on glass plates and that will operate automatically afterit is properly adjusted.

To these ends myinvention consists in certain features of constructionand combinations of parts, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters and numerals of referenceindicate corresponding parts in all the figures.

Figure 1 is a front elevation of the machine,-

partly in section and broken away to expose interior features ofconstruction. Fig. 2 is a transverse section taken on the line 2 2 inFig. 1. Fig. 3 is a plan view of the device, taken on the line 3 3 inFig. 2, one end portion being broken away. Fig. 4 is an enlargedsectional side elevation of a portion of the device, taken on the line 44 in Fig. 1, viewed in the direction of the arrow 4; and Fig. 5 is afront elevation, broken away and in section, of the parts shown in Fig.4, taken on the line 5 5 in said figure.

A heavy strong frame, preferably made of metal, is provided for thesupport of other parts of the machine, and consists of two elongatedparallel sides A, which are joined together at their ends by the legs B,which extend outwardly toward their bases at, so as to aiford a stablesupport for all parts above. The upper surfaces of the sides A arefinished by machinery to render them level, and they are also trned upontheir edges, which are preferably undercut to adapt them to receive andretain in sliding condition a carriage O,

which will be further described. The width of the legs B is soproportioned with regard to that of the shears A, by which term I preferto designate the joined sides previously mentioned, that the standards Dmay be erected from the legsforwardly of the shears to sustain otherparts, as will appear.

A preferably angle-iron skeleton table or platen E is furnished for thesupport of the material which is to be operated upon. Said platen,having a length and width proportioned to the desired capacity of themachine, is held at such end adj ustably in connection with thestandards D by the device more clearly shown in Figs. 4 and 5. Thesuspending appliances for the platen E are similar at each end of thesame. Hence a description of one will suffice for both, and, asrepresented, they consist of a flanged nut 17, which is bolted to astandard D, so that the engaged screw 0 will project forwardly and at aright angle to the front edge of the standard, having two radial collars61 formed on it near the threaded portion of the bod y and a hand-wheele affixed on its outer end. A bracketarm g is secured to the center barand end piece of the platen E, as shown in Fig. 5, the projectingportion of which arm is journaled to receive and loosely support apendent fork-piece h, that straddles the body of the screw 0 and isinserted between the collars d. It will be seen that the provision ofthe duplicate suspending devices for the platen E will, if these arelocated on the platen and standards D at directly opposite points aproper distance above the top face of the shears A, permit.

said platen to be adjusted at any desired angle from a perpendicularplane by an equal movement of the hand-wheels c on the screws 0 if thelower edge of the platen is held from a swinging movement.

A projecting ledge 'i is formedon or secured to the lower edge of theplaten E, which extends forward sufficiently to afford a proper seat,whereon the plate of glass F is placed when its edges are to be beveled,the plate resting againstthe longitudinal bars of the platen, which whenrearwardly inclined will sustain the plate with its lower forward edgeor corner properly projected to allow the grinding and polishing deviceto have contact therewith, the weight of the thick plate F serving toretain it in position without clam ping, which, however, can be effectedby the use of any suitable clamp applied to the plate and bars of theplaten in an obvious manner.

The carriage 0, previously mentioned, is clipped at its edges to theundercut edges of the shears A, and has a depending nut 7c secured onits lower side, which is adapted to engage a driving-screw G, thatextends longitudinally of the shears, is journ aled thereon at the endsof the shears, and projects at one end for the reception of threepulleys 1 2 3. The outer pulleys 1 3 are secured by any proper means 011the projecting screw G, and the intermediate pulley 2 is left loose, thethree pulleys having equal diameter and face width, as shown in Fig. 1.

Upon the terminal of the screw G, which extends outside of the pulley 3,a balancewheel H is mounted and affixed. Said Wheel having a heavy rim,is adapted to steady the movement of the machine and give sufficientmomentum to the screw G to effect the shipping of the belts that driveit, and which will be further described.

On the carriage 0 two pedestal-boxes m are secured, which aretransversely bored in axial alignment to receive a mandrel m, which issuitably journaled to have a revoluble engagement with said boxes, thebody of the mandrel being extended forwardly a proper length to supportthe grinding-wheel I on its end in such a relative position that theinner vertical face of the wheel will lie in a plane close to the loweredge of the glass plate F when said plate is inclined to project itslower portion toward the grinding-wheel, as represented in Fig. 2.

Between the pedestal-boxesm a small bandpulley J is located on and adjustably secured in any proper manner to the mandrel m, the pulley namedserving to receive and transmit rotary motion to the grinding-wheel I,and also from its location between the fixed pedestals preventing alongitudinal movement of the mandrel and attached wheel J.

At a convenient height above the machine a driving-shaft L is supportedin a plane parallel to the shears A by its revoluble connection with theboxes of the hangers M, which latter are hung from elevated timbers orother stable support. The length of the drivingshaft L should be greaterthan the length of the shears A and the distance between the hangers Msufficient to permit a long drum N to be mounted on and secured to theshaft. Said drum having a true cylindrical form, is of such a relativelength and diameter as will adapt it to transmit motion and power to themandrel m by means of the belt 0, which is given a quarter-turn tolocate its lower bight upon the band-pulley J, which lies in a plane atright angles to that of the drum, longitudinally considered.

On the portion of the driving-shaft L which is directly above thepulleys 1 2 3 a driving-pulley P is secured, having a breadth of faceequal to that of the three lower pulleys mentioned, and on the upper andlower pulleys two belts R R are placed, which are of the same width,that should nearly equal the face breadth of the change-pulleys 1 2 3,the belt R being crossed or given a half-turn to change the direction ofmotion as compared to that of the other belt R. On the opposite endportion of the driving-shaft L fast and loose pulleys S S are retainedby usual means, and are designed to afford means for the transmission ofmotion and driving force from a source of power (not shown) by the useof a main belt. (Not shown.)

A belt-shifting bar T is provided, which is of alength which willproject it slightly beyond one end of the shears A through an aperturein the depending screw-nut 7c of the carriage O, and far enough outsidethe leg at the other end of the shears to receive the belt-shipping armsat, that project between the belts R R, as represented in Fig. 3.

Two shifting-dogs 0 are loosely mounted upon the bar T, which haveclamping-screws 0, whereby the dogs may beset at any desired point onthe bar, these movable devices when secured affording abutments whereonthe opposite edges of the carriage C will impinge when said carriage isforced by the revolution of the screw G in either direction of travel,the contact of parts just mentioned causing the alternate shipping ofthe belts R R and change in direction of longitudinal movement of thecarriage, as will be readily understood.

In order to assure a proper contact of the edge of the glass plate Fwith the grinding or polishing wheel I, a provision is made to enforcethe same, and to this end two similar appliances are furnished, whichare connected with the platen E and standards D near their top edges.Said pressure-jacks each consist of a bent lever it, which is pivoted byone end a to the inner surface of the standard D, (see Figs. 2 and'3,)there being similar weights 0) placed on the free end portions of thelevers and adjustably secured thereto. The lower edges of the levers urest upon the rollers 20, which arepivotally supported on studs whichproject from the sides of the platen E, and as the levers to projectforwardly it is evident that the imposed weight on each roller willpress the upper edge of the platen E and glass plate on it toward therear of the machine and the lower edge of the plate of glass against thegrinding-wheel I.

In service the dogs 0 are set at such points as will permit thereciprocal travel of the carriage C and guiding-wheel thereon a properdistance, so that the grinding-wheel I will cut a bevel face on theplate, the degree of sloping inclination from the level face of theglass being controlled by the manipulation of the hand-wheels 6. Afterthe edge of the the pulleys l 2 3 that its terminal end 4 willplate Fhas been reduced to roughly form a proper bevel near its edge on thefront face, the grinding-wheel, of stone or other suitable grittymaterial, is removed and a finer wheel substituted therefor, abuffing-wheel being employed to polish the surface, which wheel may bemade of any proper material which will permit it to be clamped upon theend of the mandrel m and receive rotary motion from it.

As it is desirable to control the reciprocal movements of the machineinstantly at any time during the operation just described, a longhand-shifting rod U is mounted on the shears A, so as to be readilymanipulated at any point in front of the machine, which rod is looselysupported in small bracket-boxes, and is so bent at the end of theshears near align with the end of the shifting-bar T, to which it isattached, whereby the rod Uwhen moved by hand endwise will change thebelts R R and reverse the movement of the carriage G, the arrest ofmotion being produced by throwing the main driving-belt onto the loosepulley S, as is usual with power-driven machinery.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. The combination, with a pair of standardserected on a pair of elongated horizontal shears and a platen adapted toswing on the standards near its center of height, of two similar bracketarms on the platen, each adapted to loosely support a pendent forkpiece,a flanged nut on each standard, and a screw for each nut, having tworadial collars which embrace the sides of each fork-piece, substantiallyas set forth.

2. In a glass-beveling machine, the combination, with the glasssupporting frame formed with pivots, of forked pendent pieces on saidpivots and screw-rods ranging transversely of the machine and formedwith annular beads or collars, between which the forked ends of the saidpendent pieces are loosely received, substantially as described.

EUGENE HOMAN.

WVitnesses:

F. W. HANAFORD,

O. SEDGWIOK.

